SGClark,
Not sure what you are saying about your current turbo. It is leaking oil past the seals into the charged air stream, going through the intercooler and into the intake manifold where it is burned during compression? If so, it has to be using oil. By blowby do you mean the tube coming out of the timing gear case cover? Need more info to understand what is going on. Are you for sure the current turbo is bad?
If you do need a replacement I would go with the same turbo, should run about $350. For your elevation and being used for towing a bigger turbo will only hurt your egt's for the most part. I would instead install an aftermarket camshaft and, if you don't have one already, a Smarty, both of which will help lower egt's.
Fill out the signature on your profile so we know what your truck is (transmission, mods, year, etc).
Godspeed,
Trent
what type of cam are you talking about? I'm stil;l working on pulling the motor and searching for a rebuild kit. A cam might as well go next, huh? (Apprppriate pricing provided. )
Also, a smarty will help lower egt's? That surprises me. I will put that on the list next for sure! I have been thinking that route anyway as the hypertech isn't all that wonderful... .